<?php
	class Student {
		public $name;
		protected $sex;
		private $add;
		public function __construct($name,$sex,$add) {
			$this->name=$name;
			$this->sex=$sex;
			$this->add=$add;
		}
	}

	//测试
	$stu=new Student('tom','男','北京');
	//序列化
	$str=serialize($stu);
	file_put_contents('./stu.txt',$str);

	//反序列化，类的反序列化必须要有类的参与

	$str=file_get_contents('./stu.txt');
	$stu=unserialize($str);
	echo '<pre>';
	var_dump($stu);

?>